kernel: Use Scheduler class for threading.

src/core/hle/kernel/thread.h

@@ -249,16 +249,6 @@ private:
 SharedPtr<Thread> SetupMainThread(VAddr entry_point, u32 priority,
                                   SharedPtr<Process> owner_process);
 
-/**
- * Returns whether there are any threads that are ready to run.
- */
-bool HaveReadyThreads();
-
-/**
- * Reschedules to the next available thread (call after current thread is suspended)
- */
-void Reschedule();
-
 /**
  * Gets the current thread
  */
@@ -290,9 +280,4 @@ void ThreadingInit();
  */
 void ThreadingShutdown();
 
-/**
- * Get a const reference to the thread list for debug use
- */
-const std::vector<SharedPtr<Thread>>& GetThreadList();
-
 } // namespace Kernel